信息網(wǎng)絡(luò)通信基礎(chǔ)(已修改)
2025-01-08 12:51 本頁面
【正文】 Data Communications Networking Chapter 1 Introduction 第一章 緒論 Department of Electronic and Communication Engineering NCEPU 1 Data Communications Networking 2 Data Communications Networking 3 Data Communications Networking 4 Data Communications Networking Chapter 1 Introduction 緒論 5 Data Communications Networking 11 DATA COMMUNICATIONS 數(shù)據(jù)通信 The term telemunication means munication at a distance. The word data refers to information presented in whatever form is agreed upon by the parties creating and using the data. Data munications are the exchange of data between two devices via some form of transmission medium such as a wire cable. Components 組成 Data Representation 數(shù)據(jù)表示 Data Flow 數(shù)據(jù)流 Topics discussed in this section: 6 Data Communications Networking Data munications are the exchange of data between two devices via some form of transmission medium such as a wire cable. The effectiveness of a data munications system depends on four fundamental characteristics: 1. Delivery. 傳遞性 The system must deliver data to the correct destination 2. Accuracy. 準(zhǔn)確性 3. Timeliness. 及時性 4. Jitter. 抖動性 Jitter refers to the variation in the packet arrival time. (audio or video) 7 Data Communications Networking Figure Five ponents of data munication 1. Message 報文 2. Sender 發(fā)送方 3. Receiver 接受方 4. Medium 介質(zhì) 5. Protocol 協(xié)議 8 Data Communications Networking Data Representation 數(shù)據(jù)表示 ? Text 文本 ? Numbers 數(shù)字 ? Images 圖像 ? Audio 音頻 ? Video 視頻 9 Data Communications Networking Figure Data flow (simplex, halfduplex, and fullduplex)p6 數(shù)據(jù)流分為單工、半雙工和雙工 10 Data Communications Networking 12 NETWOR
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